[SIPForum-discussion]Unregister while SIP client is in active session

[amar deep]

Hi All,
  

Can a SIP Client A, in a active session with SIP Client B, send an Unregister messsage( means Register message with timer expiry=0) , and then comes out from the loop ?

Also if yes, the Register message(t=0) should bear same dialogue ID . But I am getting "481 Call/Transaction Does Not Exist" error message.

- Amar

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